Подклассы BaseDatabaseOperations могут потребовать метод datetime_extract_sql()

Я работаю над проектом Django, интегрированным с MongoDB в качестве базы данных. Я настроил свои модели для простого сообщения в блоге, представления ( представления на основе функций) и URL, но у меня возникает такая ошибка, когда я хочу добавить сообщение (пока из области администратора):

NotImplementedError at /admin/mongo/post/add/
subclasses of BaseDatabaseOperations may require a datetime_extract_sql() method

models.py

from django.db import models
from django.utils import timezone
from django.contrib.auth.models import User
from django.urls import reverse

# Create your models here.


class PublishedManager(models.Manager):
    def get_queryset(self):
        return super(PublishedManager, self).get_queryset().filter(status='published')


class Post(models.Model):
    STATUS_CHOICES = (
        ('draft', 'Draft'),
        ('published', 'Published'),
    )
    title = models.CharField(max_length=250)
    slug = models.SlugField(max_length=250, unique_for_date='publish')
    author = models.ForeignKey(
        User, on_delete=models.CASCADE, related_name='blog_posts')
    body = models.TextField()
    publish = models.DateTimeField(default=timezone.now)
    created = models.DateTimeField(auto_now_add=True)
    status = models.CharField(
        max_length=10, choices=STATUS_CHOICES, default='draft')
    objects = models.Manager()
    published = PublishedManager()

    class Meta:
        ordering = ('-publish',)
        verbose_name = 'Post'
        verbose_name_plural = 'Posts'

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        return reverse("mongo:post_detail", args=[self.publish.year, self.publish.month, self.publish.day, self.slug])

views.py

from django.shortcuts import render, get_object_or_404
from .models import Post

# Create your views here.


def post_list(request):
    posts = Post.published.all()
    return render(request, 'blog\post\list.html', {'posts': posts})


def post_detail(request, year, month, day, post):
    post = get_object_or_404(Post, slug=post,
 status='published',
 publish__year=year,
 publish__month=month,
 publish__day=day)
    return render(request, 'blog/post/detail.html', {'post': post})

Вернуться на верх